<template>
  <el-container>
    <!-- 头部 -->
    <el-header>
      <div>
        <img
          src="../assets/logo.png"
          alt
        >
        <span>健身网站管理系统</span>
      </div>
      <el-button
        type="info"
        @click="logout"
      >
        退出
      </el-button>
    </el-header>
    <!-- 主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div
          class="toggle-button"
          @click="togleCollapse"
        >
          <i v-if="isCollapse === false"
             style="font-size: 28px"
             class="el-icon-s-unfold"></i>
          <i v-else class="el-icon-s-fold"
             style="font-size: 28px"></i>
        </div>

        <el-menu
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409FFF"
        >
          <!-- :unique-opened="true"->只允许展开一个菜单 -->
          <!-- :collapse-transition="false" -> 关闭动画 -->
          <!-- router -> 导航开启路由模式 -->
          <!-- 一级菜单  -->
          <el-submenu
            :index="item.id+''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <i :class="iconObj[item.id]" />
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.childMenu"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <!-- 导航开启路由模式：
                将index值作为导航路由 -->
              <!-- 二级菜单的模板区域 -->
              <template slot="title">
                <i class="el-icon-menu" />
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 内容主体 -->
      <el-main>
        <router-view />
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
import { request } from '../network/request';

export default {
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      iconObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao',
      },
      // 默认不折叠
      isCollapse: false,
      // 被激活导航地址
      activePath: '',
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem('activePath');
  },
  methods: {
    logout() {
      // 清空token
      // window.sessionStorage.clear();
      this.$router.push('/login');
    },
    // 获取请求菜单
    // eslint-disable-next-line consistent-return
    getMenuList() {
      request({
        url: '/menus',
      }).then((res) => {
        this.menuList = res.data;
      });
      // if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      // this.menuList = res.data;
      // console.log(res)
    },
    // 菜单的折叠与展开
    togleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    // 保存连接的激活地址
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath);
    },
  },
};
</script>

<style lang="less" scoped>
.el-container {
  height: 100%;
}
.el-header {
  background-color: #373f41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    img {
      height: 40px;
    }
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;

  .el-menu {
    border: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button {
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  // 鼠标放上去变成小手
  cursor: pointer;
}
</style>
